Twitter Tools for Contracts - What are your favorites?

This is a continuation of Twitter Made Easy for Contracts, which I will post in full to All Things Sterling and GovLoop.

Twitter's strength lies in developers making crazy amounts of useful tools. There are literally thousands of them out there.

Personally, I regularly use Backupify, HootSuite (it's not software, so I can access it from work), and Tweepler. MentionMap is also growing on me. (It's a lot of fun and pretty handy.)

My question is this:

What are your favorite Twitter Tools for contracts?